Depositional setting and diagenetic evolution of some Tertiary unconventional reservoir rocks, Uinta Basin, Utah
Janet K. Pitman, T. D. Fouch, M. B. Goldhaber
1982, American Association of Petroleum Geologists Bulletin (66) 1581-1596
The Douglas Creek Member of the Tertiary Green River Formation underlies much of the Uinta basin, Utah, and contains large volumes of oil and gas trapped in a complex of fractured low-permeability sandstone reservoirs. In the southeastern part of the basin at Pariette Bench, the Eocene Douglas Creek Member is...
Rapid intrusion of magma into wet rock: Groundwater flow due to pore pressure increases
P.T. Delaney
1982, Journal of Geophysical Research Solid Earth (87) 7739-7756
Analytical and numerical solutions are developed to simulate the pressurization, expansion, and flow of groundwater contained within saturated, intact host rocks subject to sudden heating from the planar surface of an igneous intrusion. For most rocks, water diffuses more rapidly than heat, assuring that groundwater is not heated along a...
A note on the Goodman Jack
H.S. Swolfs, J.D. Kibler
1982, Rock Mechanics Felsmechanik Mecanique des Roches (15) 57-66
A Note on the Goodman Jack. Reconnaissance experiments, performed to evaluate the practical utility of the hard-rock variety of the Goodman Jack 1, reveal that the Hustrulid-T* correction adequately reconciles the discrepancy between the measured and true deformation modulus of the rock mass in the range of 30 to50 gigapascals....
Oxygen isotope geothermometry and stability of lawsonite and pumpellyite in the Shuksan Suite, North Cascades, Washington
E. H. Brown, J. R. O’Neil
1982, Contributions to Mineralogy and Petrology (80) 240-244
Metamorphic temperatures of 330??-400?? C are inferred for rocks from the Shuksan blueschist terrane in the North Cascades, Washington. The temperatures are calculated from 18O fractionations between coexisting quartz and magnetite using the equations of Bottinga and Javoy (1973). Pressures of approximately 7 kilobars are indicated by the Jadeite content...
Nutrient exchange across the sediment-water interface in the Potomac River estuary
E. Callender, Douglas E. Hammond
1982, Estuarine, Coastal and Shelf Science (15) 395-413
The flux of ammonia, phosphate, silica and radon-222 from Potomac tidal river and estuary sediments is controlled by processes occurring at the sediment-water interface and within surficial sediment. Calculated diffusive fluxes range between 0·6 and 6·5 mmol m−2 day−1 for ammonia, 0·020 and 0·30 mmol m−2 day−1 for phosphate, and 1·3 and 3·8 mmol...
Miocene volcanism and deformation in the western Cordillera and high plateaus of south-central Peru
E.H. McKee, D. C. Noble
1982, Geological Society of America Bulletin (93) 657-662
New radiometric ages on tuffs from south-central Peru support the postulated flare-up of volcanic activity during early Miocene time. In the region of Huancavelica, Julcani, and Lircay, lower Miocene rocks lie on folded strata of pre-Cenozoic age; the absence of units of Eocene...
The mobility of uranium and other elements during alteration of rhyolite ash to montmorillonite: A case study in the Troublesome Formation, Colorado, U.S.A.
R. A. Zielinski
1982, Chemical Geology (35) 185-204
An unusual occurrence of juxtaposed glassy and clay-altered ash was sampled to estimate the degree and type of element mobility during alteration of glass to montmorillonite. The results are particularly interesting in that major mobilization of uranium is indicated. Closely spaced samples of glassy and montmorillonitic ash were collected from...
Obtaining maps and data from the U.S. Geological Survey
Cheryl A. Hallam
1982, Computers, Environment and Urban Systems (7) 283-294
The U.S. Geological Survey produces a variety of resource information for the United States. This includes many data bases of particular interest to planners such as land use and terrain information prepared by the National Mapping Division, water quantity and quality data collected by Water Resources Division, and coal resource...
Mapping of ultramafic rocks in a heavily vegetated terrain using Landsat data
G. L. Raines, J. C. Wynn
1982, Economic Geology (77) 1755-1761
No abstract available....
A quantitative index of soil development from field descriptions: Examples from a chronosequence in central California
J.W. Harden
1982, Geoderma (28) 1-28
A soil development index has been developed in order to quantitatively measure the degree of soil profile development. This index, which combines eight soil field properties with soil thickness, is designed from field descriptions of the Merced River chronosequence in central California. These eight properties are: clay films, texture plus...
Determination of polar organic solutes in oil-shale retort water
J.A. Leenheer, T.I. Noyes, H. A. Stuber
1982, Environmental Science & Technology (16) 714-723
No abstract available....
Determination of rare earth elements in geological materials by inductively coupled argon plasma/atomic emission spectrometry
J.G. Crock, F.E. Lichte
1982, Analytical Chemistry (54) 1329-1332
Inductively coupled argon plasma/optical emission spectrometery (ICAP/OES) is useful as a simultaneous, multielement analytical technique for the determination of trace elements in geological materials. A method for the determination of trace-level rare earth elements (REE) in geological materials using an ICAP 63-channel emission spectrometer is described. Separation and preconcentration of...
Properties, origin and nomenclature of rodlets of the inertinite maceral group in coals of the central Appalachian basin, U.S.A.
P.C. Lyons, R. B. Finkelman, C.L. Thompson, F. W. Brown, Patrick G. Hatcher
1982, International Journal of Coal Geology (1) 313-346
Resin rodlets, sclerenchyma strands and woody splinters, which are collectively called rodlets, were studied by chemical, optical petrographic, and scanning-electron microscopic (SEM) techniques. A study was made of such rodlets from the bituminous coal beds of the central Appalachian basin (Pennsylvanian; Upper Carboniferous) of the United States. Comparisons were made...
Holocene sedimentation in the shallow nearshore zone off Nauset Inlet, Cape Cod, Massachusetts
D.G. Aubrey, D.C. Twichell, S.L. Pfirman
1982, Marine Geology (47) 243-259
Present conditions and sedimentary evolution of the shallow offshore region near Nauset Inlet on Cape Cod, Massachusetts were clarified using high-resolution seismic-reflection profiles, sidescan-sonar records, surface grab samples and current meter measurements. The study area contains three provinces: (1) a nearshore province (shallower than 18 m) with a relatively steep...
Permafrost, heat flow, and the geothermal regime at Prudhoe Bay, Alaska
A.H. Lachenbruch, J.H. Sass, B.V. Marshall, T. H. Moses Jr.
1982, Journal of Geophysical Research Solid Earth (87) 9301-9316
Temperature measurements through permafrost in the oil field at Prudhoe Bay, Alaska, combined with laboratory measurements of the thermal conductivity of drill cuttings permit an evaluation of in situ thermal properties and an understanding of the general factors that control the geothermal regime. A sharp contrast in temperature gradient at...
Extension in the Rio Grande rift
L. Cordell
1982, Journal of Geophysical Research Solid Earth (87) 8561-8569
A positive gravity anomaly along the axis of the Rio Grande rift reflects a volume of anomalous mass added at the base of the crust and intruded into the crust. Part of this volume can be associated with vertical uplift of the crust. The remainder of this anomalous volume, plus...
Chemical and isotopic diversity in basalts dredged from the East Pacific Rise at 10°S, the fossil Galapagos Rise and the Nazca plate
Rodey Batiza, Richard Oestrike, Kiyoto Futa
1982, Marine Geology (49) 115-132
We present petrographic, chemical and isotopic data for fresh lava samples dredged from three regions: (1) the fossil Galapagos Rise; (2) an elongate volcano near this extinct spreading center; and (3) the East Pacific Rise at 10°S. The samples from the Galapagos Rise are among the first samples from...
Assessment of models proposed for the 1981 revision of the IGRF
N.W. Peddie, E.B. Fabiano
1982, Journal of Geomagnetism & Geoelectricity (34) 387-392
For the second revision of the International Geomagnetic Reference Field (IGRF), the U. S. National Aeronautics and Space Administration (NASA), the U. K. Institute of Geological Sciences (IGS), and the U. S. Geological Survey (USGS) submitted proposed models of the Earth's main magnetic field at 1965.0, 1970.0, 1975.0, and 1980.0,...
An analysis of input errors in precipitation-runoff models using regression with errors in the independent variables
Brent M. Troutman
1982, Water Resources Research (18) 947-964
Errors in runoff prediction caused by input data errors are analyzed by treating precipitation-runoff models as regression (conditional expectation) models. Independent variables of the regression consist of precipitation and other input measurements; the dependent variable is runoff. In models using erroneous input data, prediction errors are inflated and estimates of...
Stratigraphy, structure, absolute age, and paleontology of the upper Pleistocene deposits at Sankaty Head, Nantucket Island, Massachusetts
Robert N. Oldale, Page C. Valentine, T. M. Cronin, E.C. Spiker, B. W. Blackwelder, D. F. Belknap, J.F. Wehmiller, Barney J. Szabo
1982, Geology (10) 246-252
The Sankaty Head cliff exposes drift of at least two glaciations and interglacial marine deposits. Radiocarbon, amino-acid- racemization, and uranium-thorium analyses were used to determine the absolute ages of the beds. The results indicate that 1) the Sankaty Sand correlates with oxygen-isotope stage 5 (Sangamonian), 2) the underlying drift is...
Lead and strontium isotopes and related trace elements as genetic tracers in the Upper Cenozoic rhyolite-basalt association of the Yellowstone Plateau volcanic field
B. R. Doe, W.P. Leeman, R.L. Christiansen, C. E. Hedge
1982, Journal of Geophysical Research Solid Earth (87) 4785-4806
Supported by various field geologic and petrologic data, the contents of Pb, U, Th, Rb, and Sr and the isotopic compositions of Pb and Sr for upper Cenozoic volcanic rocks of the Yellowstone Plateau volcanic field are consistent with the hypothesis of derivation of the basaltic and rhyolitic magmas by...
Comparison of amino acid racemization geochronometry with lithostratigraphy, biostratigraphy, uranium-series coral dating, and magnetostratigraphy in the Atlantic Coastal Plain of the southeastern United States
L. McCartan, J. P. Owens, B. W. Blackwelder, Barney J. Szabo, D. F. Belknap, N. Kriausakul, R.M. Mitterer, J.F. Wehmiller
1982, Quaternary Research (18) 337-359
The results of an integrated study comprising litho- and biostratigraphic investigations, uranium-series coral dating, amino acid racemization in molluscs, and paleomagnetic measurements are compared to ascertain relative and absolute ages of Pleistocene deposits of the Atlantic Coastal Plain in North and South Carolina. Four depositional events are inferred for South...
Low-temperature formation of hydrocarbon gases in San Francisco Bay sediment (California, U.S.A.)
T.M. Vogel, R.S. Oremland, K.A. Kvenvolden
1982, Chemical Geology (37) 289-298
To understand the processes responsible for the presence of low-molecular-weight hydrocarbons (C1-C4) in anoxic environments, we studied sediments collected from an anaerobic estuarine mudflat. In these sediments methane (C1) was several orders of magnitude more abundant than all other C2-C4 hydrocarbons; the C1 (C2 + C3) ratio was ??? 13,000....
Chemical and light-stable isotope characteristics of waters from the Raft River geothermal area and environs, Cassia County, Idaho; Box Elder County, Utah
M. Nathenson, N.L. Nehring, E. G. Crosthwaite, R.S. Harmon, C. Janik, J. Borthwick
1982, Geothermics (11) 215-237
Chemical and light-stable isotope data are presented for water samples from the Raft River geothermal area and environs. On the basis of chemical character, as defined by a trilinear plot of per cent milliequivalents, and light-stable isotope data, the waters in the geothermal area can be divided into waters that...
Extreme fractionation of 234U 238U and 230Th 234U in spring waters, sediments, and fossils at the Pomme de Terre Valley, southwestern Missouri
Barney J. Szabo
1982, Geochimica et Cosmochimica Acta (46) 1675-1679
Isotopic fractionation as great as 1600% exists between 234U and 238U in spring waters, sediments, and fossils in the Pomme de Terre Valley, southwestern Missouri. The activity ratios of 234U238U">234U238U in five springs range from 7.2 to 16 in water which has been discharged for at least the...
